[en] The coherent states (condensates) constructed using the classical soliton-like solution of the one-dimensional field equation are considered. The narrowness of the PSI boson is explained due to the smallness of the amplitude of the condensate transition to the state with a number of particles being definite and much less than the average number of particles in the condensate. The PSI' boson is interpreted as a condensate whose average field slightly differs from that in the PSI state. The transition PSI'→PSI is shown to be not suppressed